WIRING DIAGRAMS
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
HI
G
H V
O
LT
A
G
E!
DI
SCO
NNE
CT
AL
L
PO
W
ER BE
FO
RE
S
ERV
ICI
NG
O
R I
NS
TA
LL
IN
G
T
HI
S
U
N
IT
. M
U
LT
IPL
E PO
W
ER
SO
U
R
C
ES M
AY B
E P
R
ESEN
T.
F
A
IL
U
R
E
TO
DO
S
O
M
AY
CAUS
E P
RO
PE
RT
Y DAM
AG
E,
P
ERS
O
NAL
INJ
UR
Y O
R DE
AT
H
.
103
EMERGENCY
HEAT
RELAY
1
3
4
2
BLUE
WHITE
BLACK
BROWN
THERMOSTAT
OT/EHR18-60
2
1
From Air Handler
C
G
W2
R
C
R
W2
O
Y
From Outdoor Unit
C
G
W2
E
R
O
Y
Ind
oo
r T
her
m
os
ta
t
BLU
E
GR
EEN
WH
ITE
RE
D
BLU
E
RE
D
WH
ITE
ORA
NG
E
YEL
LO
W
10kw and Below, One Stage Electric Heat
RED
EMERGENCY
HEAT
RELAY
1
4
2
BLUE
WHITE
BLACK
BROWN
THERMOSTAT
OT/EHR18-60
2
1
From Air Handler
C
G
W2
R
C
R
W2
O
Y
From Outdoor Unit
C
G
W2
E
R
O
Y
Indo
or
T
her
mos
tat
W3
BL
UE
GR
EE
N
WH
ITE
RED
BR
OW
N
BL
UE
RED
WH
ITE
OR
AN
GE
YELLO
W
15kw and Above, Two Stage Electric Heat
3
RED
SEE NOTE
Note:
When using a Thermostat with only one
stage for electric heat (W2), tie white and
brown wires from air handler together.
Typical Wiring Schematics for OT/EHR18-60 (Outdoor Thermostat & Emergency Heat Relay).
This wiring diagram is for reference only. Not all wiring is as shown above.
Refer to the appropriate wiring diagram for the unit being serviced.
Summary of Contents for ANX
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Page 6: ...PRODUCT IDENTIFICATION 6...
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